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KVM: Convert mask notifiers to use irqchip/pin instead of gsi

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Devices register mask notifier using gsi, but irqchip knows about
irqchip/pin, so conversion from irqchip/pin to gsi should be done before
looking for mask notifier to call.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gleb Natapov 2010-07-11 15:32:23 +03:00 committed by Avi Kivity
parent 2e2602ca5d
commit 4a994358b9
3 changed files with 11 additions and 6 deletions
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3
include/linux/kvm_host.h
View File

@ -447,7 +447,8 @@ void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn);
void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
struct kvm_irq_mask_notifier *kimn);
void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
bool mask);
#ifdef __KVM_HAVE_IOAPIC
void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,

2
virt/kvm/ioapic.c
View File

@ -152,7 +152,7 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
update_handled_vectors(ioapic);
mask_after = e->fields.mask;
if (mask_before != mask_after)
kvm_fire_mask_notifiers(ioapic->kvm, index, mask_after);
kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after);
if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG
&& ioapic->irr & (1 << index))
ioapic_service(ioapic, index);

8
virt/kvm/irq_comm.c
View File

@ -279,14 +279,18 @@ void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
synchronize_rcu();
}
void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask)
void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
bool mask)
{
struct kvm_irq_mask_notifier *kimn;
struct hlist_node *n;
int gsi;
rcu_read_lock();
gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
if (gsi != -1)
hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link)
if (kimn->irq == irq)
if (kimn->irq == gsi)
kimn->func(kimn, mask);
rcu_read_unlock();
}